- Author
- Carhart, H. W. | Leonard, J. T. | DiNenno, P. J. | Forssell, E. W. | Starchville, M. D.
- Title
- Discharge System Tests of Halon 1301 Test Gas Simulants. Interim Report. June 1988- September 1988.
- Coporate
- Naval Research Lab., Washington, DC Hughes Associates Inc., Wheaton, MD
- Sponsor
- Naval Sea Systems Command, Washington, DC
- Report
- NRL Memorandum Report 6898, September 19, 1991, 115 p.
- Keywords
- halon 1301 | ships | flooding | sulfur hexafluoride | tests
- Identifiers
- halon 1301 simulants; chlorodifluoromethane
- Abstract
- All new and retrofit installations of Halon 1301 total flooding systems in shipboard machinery spaces require an acceptance discharge test. It is desirable to use a simulant instead of Halon 1301 in view of current and future restrictions regarding the discharge of Halons into the atmosphere. Two candidate simulants: sulfur hexafluoride (SF6) and chlorodifluoromethane (R-22) wsere evaluated on the basis of flow through the piping networks of both modular and bankes systems. Sulfur hexafluoride was found to discharge at a similar rate to Halon 1301, while R-22 discharged faster in all tests. The flow splits for both candidate simulants in banked systems were similar to those of Halon 1301. Together with work on leakage from an enclosure and initial mixing, these tests have shown that sulfur hexafluoride is an excellent simulatn for Halon 1301. These conclusions will be confirmed in full scale tests.